A kind of production method of dry process acrylic fiber 1.33dtex short fiber

A production method and technology of dry-laid acrylic fibers, which are applied in the chemical characteristics of fibers, complete sets of equipment for producing artificial threads, textiles and papermaking, etc., can solve the problems of inability to produce and do not mass-produce 1.33dtex staple fibers, and achieve yarn coloring. Normal, promote the entry into the field of high-end textile products, and achieve the effect of sustainable development of enterprises

Active Publication Date: 2021-10-22
CHINA PETROLEUM & CHEM CORP
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Domestic dry-process acrylic fibers are generally dominated by products with a linear density above 1.67dtex, and conventional production processes cannot produce dry-process acrylic fine-denier fibers with a linear density of 1.33dtex or below.
There is no production method for mass production of 1.33dtex staple fiber

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of production method of dry process acrylic fiber 1.33dtex short fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Refer to attached figure 1 The specific preparation steps are polymerization, primary filtration, secondary filtration, polymer drying, stock solution preparation, stock solution filtration, spinning, washing and drawing, fiber drying, and packaging;

[0027] In the polymerization step of this embodiment, the polymer obtained by polymerizing three monomers of acrylonitrile, methyl acrylate and sodium styrene sulfonate is used as the spinning stock solution, wherein the mass ratio of acrylonitrile, methyl acrylate and sodium styrene sulfonate is 93.5:6:0.8; solution polymerization is adopted, and the solvent used is a composite solvent prepared from dimethylformamide and sodium thiocyanate at a mass ratio of 88:12; the polymerization temperature is 68°C;

[0028] In this embodiment, the temperature of the spinning tunnel is controlled during spinning, washing and drawing: the air chamber temperature is 330°C, the temperature of the vertebral body is 205°C, the temperatur...

Embodiment 2

[0030] Refer to attached figure 1 The specific preparation steps are polymerization, primary filtration, secondary filtration, polymer drying, stock solution preparation, stock solution filtration, spinning, washing and drawing, fiber drying, and packaging;

[0031] In the polymerization step of this embodiment, the polymer obtained by polymerizing three monomers of acrylonitrile, methyl acrylate and sodium styrene sulfonate is used as the spinning stock solution, wherein the mass ratio of acrylonitrile, methyl acrylate and sodium styrene sulfonate is 93:7:0.7; solution polymerization is adopted, and the solvent used is a composite solvent prepared by dimethylformamide and sodium thiocyanate at a mass ratio of 86:14; the polymerization temperature is 65°C;

[0032] In this embodiment, the temperature of the spinning tunnel is controlled during spinning, washing and drawing: the air chamber temperature is 328°C, the temperature of the vertebral body is 204°C, the temperature at...

Embodiment 3

[0034] Refer to attached figure 1 The specific preparation steps are polymerization, primary filtration, secondary filtration, polymer drying, stock solution preparation, stock solution filtration, spinning, washing and drawing, fiber drying, and packaging;

[0035] In the polymerization step of this embodiment, the polymer obtained by polymerizing three monomers of acrylonitrile, methyl acrylate and sodium styrene sulfonate is used as the spinning stock solution, wherein the mass ratio of acrylonitrile, methyl acrylate and sodium styrene sulfonate is 94:5:1; solution polymerization is adopted, and the solvent used is a composite solvent prepared with dimethylformamide and sodium thiocyanate at a mass ratio of 92:8; the polymerization temperature is 70°C;

[0036]In this embodiment, the temperature of the spinning tunnel is controlled during spinning, washing and drafting: the temperature of the air chamber is 332°C, the temperature of the vertebral body is 206°C, the temperat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for producing 1.33dtex short fibers of dry-process acrylic fiber, which belongs to the technical field of dry-process acrylic fiber production. It is characterized in that: the polymer obtained by polymerizing three monomers of acrylonitrile, methyl acrylate and sodium styrene sulfonate is used as the spinning stock solution, wherein the mass ratio of acrylonitrile, methyl acrylate and sodium styrene sulfonate is 92~ 96: 4~8: 0.5~1; control the temperature of the spinning tunnel during the spinning, washing and drawing: air chamber temperature 325°C~335°C, cone temperature 200°C~210°C, upper tunnel temperature 165°C ~175°C, the temperature of the lower part of the upper tunnel is 145°C~155°C; the washing draw ratio is 6.0~6.8 times, the washing tank temperature is 85°C~98°C; the crimping speed ratio is 10.6~11.0 times. The preferred solvent provided by the invention is more conducive to the dispersion of the formula raw materials of the invention, and the spinning dope after polymerization can better adapt to the production process with high draw ratio.

Description

technical field [0001] The invention discloses a method for producing 1.33dtex short fibers of dry-process acrylic fiber, which belongs to the technical field of dry-process acrylic fiber production. Background technique [0002] Acrylic fiber is the trade name of polyacrylonitrile fiber, and it is one of the main varieties of synthetic fibers. Dry-process acrylic fibers are solidified and molded in high-temperature nitrogen. During the fiber forming process, the evaporation rate of the solvent on the surface of the fibers is greater than that in the interior, forming a unique dog-bone cross-section of dry-process acrylic fibers. The dog-bone cross-section of dry-laid acrylic fiber makes it have better bulkiness, resilience and stronger covering ability than wet-laid acrylic fiber. The same weight of dry acrylic fabric is fuller and thicker than that of wet acrylic fiber. At the same time, the surface of the fiber is smooth, with natural luster and elegant style. These uni...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/40C08F220/44C08F220/14C08F212/14C08F2/06D01D13/00D02G1/00D02G1/16D02G1/20
CPCC08F2/06C08F220/44D01D13/00D01F6/40D02G1/004D02G1/164D02G1/20C08F220/14C08F212/14
Inventor 贾克英李志强成强孙华田李胸有
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap